23661199 has 2 divisors, whose sum is σ = 23661200. Its totient is φ = 23661198.

The previous prime is 23661173. The next prime is 23661203. The reversal of 23661199 is 99116632.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23661199 - 2¹¹ = 23659151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23661119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11830599 + 11830600.

It is an arithmetic number, because the mean of its divisors is an integer number (11830600).

Almost surely, 2^23661199 is an apocalyptic number.

23661199 is a deficient number, since it is larger than the sum of its proper divisors (1).

23661199 is an equidigital number, since it uses as much as digits as its factorization.

23661199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17496, while the sum is 37.

The square root of 23661199 is about 4864.2778497944. The cubic root of 23661199 is about 287.0861554240.

The spelling of 23661199 in words is "twenty-three million, six hundred sixty-one thousand, one hundred ninety-nine".